OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Subtle tab - A new tab chrome and firefox browser plugin that gives rejoicing experience to relieve stress, increases focus and productivity.
Workona - A better way to work in the browser.
Momentum - Agile goal and performance management
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
ProductivityTab - ProductivityTab is a popular chrome extension that comes with more than fifty featured widgets, breathtaking backgrounds, and much more.